//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP___ALGORITHM_RANGES_REPLACE_COPY_H
#define _LIBCPP___ALGORITHM_RANGES_REPLACE_COPY_H

#include <__algorithm/in_out_result.h>
#include <__algorithm/ranges_replace_copy_if.h>
#include <__config>
#include <__functional/identity.h>
#include <__functional/invoke.h>
#include <__functional/ranges_operations.h>
#include <__iterator/concepts.h>
#include <__iterator/projected.h>
#include <__ranges/access.h>
#include <__ranges/concepts.h>
#include <__ranges/dangling.h>
#include <__utility/move.h>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

#if _LIBCPP_STD_VER >= 20

_LIBCPP_BEGIN_NAMESPACE_STD

namespace ranges {

template <class _InIter, class _OutIter>
using replace_copy_result = in_out_result<_InIter, _OutIter>;

namespace __replace_copy {

struct __fn {
  template <input_iterator _InIter,
            sentinel_for<_InIter> _Sent,
            class _OldType,
            class _NewType,
            output_iterator<const _NewType&> _OutIter,
            class _Proj = identity>
    requires indirectly_copyable<_InIter, _OutIter> &&
             indirect_binary_predicate<ranges::equal_to, projected<_InIter, _Proj>, const _OldType*>
  _LIBCPP_HIDE_FROM_ABI constexpr replace_copy_result<_InIter, _OutIter>
  operator()(_InIter __first,
             _Sent __last,
             _OutIter __result,
             const _OldType& __old_value,
             const _NewType& __new_value,
             _Proj __proj = {}) const {
    auto __pred = [&](const auto& __value) { return __value == __old_value; };
    return ranges::__replace_copy_if_impl(
        std::move(__first), std::move(__last), std::move(__result), __pred, __new_value, __proj);
  }

  template <input_range _Range,
            class _OldType,
            class _NewType,
            output_iterator<const _NewType&> _OutIter,
            class _Proj = identity>
    requires indirectly_copyable<iterator_t<_Range>, _OutIter> &&
             indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _OldType*>
  _LIBCPP_HIDE_FROM_ABI constexpr replace_copy_result<borrowed_iterator_t<_Range>, _OutIter> operator()(
      _Range&& __range, _OutIter __result, const _OldType& __old_value, const _NewType& __new_value, _Proj __proj = {})
      const {
    auto __pred = [&](const auto& __value) { return __value == __old_value; };
    return ranges::__replace_copy_if_impl(
        ranges::begin(__range), ranges::end(__range), std::move(__result), __pred, __new_value, __proj);
  }
};

} // namespace __replace_copy

inline namespace __cpo {
inline constexpr auto replace_copy = __replace_copy::__fn{};
} // namespace __cpo
} // namespace ranges

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP_STD_VER >= 20

#endif // _LIBCPP___ALGORITHM_RANGES_REPLACE_COPY_H
